Egyptologists have made a stunning discovery at the famous temple of Luxor: an inscription naming a previously unknown Egyptian pharaoh.

A French team restoring a temple of Amon Ra found hieroglyphs bearing the name “Nekht In Ra.” The inscription dates to the 17th dynasty, a relatively little-known dynasty from a murky period in Egyptian history.

The mysterious dynasty was the last of the Second Intermediate Period, a time when northern Egypt was ruled by Semitic invaders called the Hyksos and the rest of Egypt had fragmented into various factions. The 17th dynasty dated from around 1585 to 1550 BC and had their capital at Thebes, next to Luxor. Most of the dates of its rulers are not known for certain and in many cases it’s not even known how long they ruled or who was related to whom. Thus the discovery of a “new” pharaoh, while important, doesn’t come as a huge surprise.

It’s unclear just how Nekht In Ra fits into the king list of the ten previously known 17th dynasty pharaohs. The Egyptian Ministry of Antiquities has called for further excavation at the discovery site to find more pieces to the puzzle.

While the 17th dynasty is obscure, it was hugely important to Egyptian history because the last two pharaohs waged war on the Hyksos and eventually defeated them, although both pharaohs appear to have died in battle. The 18th dynasty marked the beginning of the New Kingdom, a flowering of Egyptian culture and power that lasted five centuries.

Several interesting items survive from the 17th dynasty and are now on display. Check out the gallery for a sample.